Pepperoni is a spicy Italian-American variety of salami made from cured pork. However, Halal or Kosher Pepperoni may be made from beef. It is a descendant of the spicy salamis of Southern Italy, such as salsiccia Napoletana piccante, a spicy dry sausage from Naples or the Soppressata from Calabria. Pepperoni is a popular pizza topping in American-style pizzerias. Also, it is sometimes used to make sub sandwiches.